Hell yeah, mechanical numpad.
@Standplaats_KRK
This made me think: I bet someone could use a Raspberry Pi interface to connect a telegraph key to a computer, and use Morse Code to talk to the computer.
Now I want to see that done.
@ScottSoCal @Standplaats_KRK handful of videos on YouTube about it. Between keyboard, radio, & anachronistic folk Id be surprised if there wasn't pre-built kits.